﻿<p>A sound pressure level measure is a measure of the pressure fluctuations superimposed over the ambient pressure level with units of decibels with a reference value of micropascals.</p> 

<p>Type: REAL </p> 

<blockquote class="history">
HISTORY&nbsp; Renamed in IFC4 (was IfcSoundPressureMeasure).
</blockquote> 